[Bindings] Remove V8HiddenValue

third_party/WebKit/Source/bindings/core/v8/V8HiddenValue.cpp

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "bindings/core/v8/V8HiddenValue.h"
-
-#include "bindings/core/v8/ScriptState.h"
-#include "bindings/core/v8/ScriptWrappable.h"
-#include "bindings/core/v8/V8Binding.h"
-
-namespace blink {
-
-v8::Local<v8::Value> V8HiddenValue::GetHiddenValue(ScriptState* script_state,
-                                                   v8::Local<v8::Object> object,
-                                                   v8::Local<v8::String> key) {
-  v8::Local<v8::Context> context = script_state->GetContext();
-  v8::Local<v8::Private> private_key =
-      v8::Private::ForApi(script_state->GetIsolate(), key);
-  v8::Local<v8::Value> value;
-  // Callsites interpret an empty handle has absence of a result.
-  if (!V8CallBoolean(object->HasPrivate(context, private_key)))
-    return v8::Local<v8::Value>();
-  if (object->GetPrivate(context, private_key).ToLocal(&value))
-    return value;
-  return v8::Local<v8::Value>();
-}
-
-bool V8HiddenValue::SetHiddenValue(ScriptState* script_state,
-                                   v8::Local<v8::Object> object,
-                                   v8::Local<v8::String> key,
-                                   v8::Local<v8::Value> value) {
-  if (UNLIKELY(value.IsEmpty()))
-    return false;
-  return V8CallBoolean(object->SetPrivate(
-      script_state->GetContext(),
-      v8::Private::ForApi(script_state->GetIsolate(), key), value));
-}
-
-bool V8HiddenValue::DeleteHiddenValue(ScriptState* script_state,
-                                      v8::Local<v8::Object> object,
-                                      v8::Local<v8::String> key) {
-  // Actually deleting the value would make force the object into dictionary
-  // mode which is unnecessarily slow. Instead, we replace the hidden value with
-  // "undefined".
-  return V8CallBoolean(
-      object->SetPrivate(script_state->GetContext(),
-                         v8::Private::ForApi(script_state->GetIsolate(), key),
-                         v8::Undefined(script_state->GetIsolate())));
-}
-
-}  // namespace blink